<?php
/**
 * Ruth Library
 * $Id: Integer.php 2 2008-01-17 02:59:56Z baron314159@yahoo.com $
 *
 * LICENSE
 *
 * Copyright (c) 2007, Chris Utz
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Impact Lab nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY CHRIS UTZ ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL CHRIS UTZ BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @category   Ruth
 * @package    Ruth_Validate
 * @author     Chris Utz <chris@chrisutz.com>
 * @copyright  2007 Chris Utz <chris@chrisutz.com>
 * @license    http://www.opensource.org/licenses/bsd-license.php    New BSD License
 * @version    $Revision: 2 $
 */

/**
 * Ensures that a value is an integer, optionally falling within a certain
 * interval.
 *
 * @category   Ruth
 * @package    Ruth_Validate
 * @author     Chris Utz <chris@chrisutz.com>
 * @copyright  2007 Chris Utz <chris@chrisutz.com>
 * @license    http://www.opensource.org/licenses/bsd-license.php    New BSD License
 * @version    $Revision: 2 $
 */
class Ruth_Validate_Integer extends Ruth_Validate_Abstract
{
    /**
     * @param string $value
     * @return boolean
     */
    public function isValid($value)
    {
        $value = (string) $value;

        if ($this->_options->useLocale) {
            $locale = localeconv();
            // NB - decimal_point replacement is needed so that numbers such as
            // 1.0 are accepted as integers.
            $value  = str_replace($locale['decimal_point'], '.', $value);
            $value  = str_replace($locale['thousands_sep'], '', $value);
            $intVal = intval($value);
        }

        $intVal = intval($value);

        if (strval($intVal) != $value) {
            return false;
        }

        if ($this->_options->min !== null and $intVal < $this->_options->min) {
            return false;
        }

        if ($this->_options->max !== null and $intVal > $this->_options->max) {
            return false;
        }

        return true;
    }
}
 
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